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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1365e45c33cbe6f595fa6bc8158dc36358d4b40ce587d7f7619c556ef82cc5a1' 
  AND token = 'UdUL28hjQ9wGageCNEykBDNpMmANFp3aYFEB2sy05tU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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