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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e06e34fa7453990aaecd94e854020641549dd288bf4d377106857d8ef8deaa04' 
  AND token = 'AfYYc45gB/o6lnQ8FtN17UcDt3p1dilFBqWYDYvIo/o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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