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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bb30ec7a4b2393e1bab14ca213111dfea9b83fb507645051e5fae231e26c6e4c' 
  AND token = 'hP+OEslxRiv4PgxnjzT1nmK/qqgVRauPYzcklYZaT9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}