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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3a2565fc447d5e13dfa40bf305fffc9493a60d531fced7801b5d67a74aa46535' 
  AND token = '7qCRr4YrhxDZ+R8U+p5029c/F7dAD5Pkx/q6Xm9H8aE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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