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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e60ff81ffde5649e3380b3fd31d58deb3a296781e2260fdfef508dcb575353a' 
  AND token = 'wgI2r0u9YKoVoc4NUxJ1tTGNM3F5wuoY2+LU8ozgQ04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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