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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'de053fa58845c8e240c9efb1c27c64633ae31518da5e2c1166a10212603fe1d5' 
  AND token = 'l13tIfLGn5GYO3ffiXWHvKiVFSW995AQ9F0UcI5ZD7w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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