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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9089ba9acfd965d8878e59990b2fbd95b992aa531e105ef3dd1d0d57c4c755cd' 
  AND token = 'ckEbuf4TiYXYJZNTL4qRAM6sW12mmSepbJIiPl+88wU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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