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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e63bca7e1ac96a41cc9e6a2f8e96a962cf9d152bc0e9b026a829403f1c63e3a2' 
  AND token = 'ZT6Fmgq/cClrL+J/9UoHB82Pti7GqoN/U3ZM1ZHei2c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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