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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c873fc90dafaa3b5644bf2f670988e89709fb75bb437aa7cb28671b445231fb' 
  AND token = 'F0vsInJYIcQq+lkPyR7e50i6YHQ97LzPSH5Sqq5YqbE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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