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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a18e592ceaa725df390c7d7002f5a47723dbb790b922f34ab2ff2950b0c2c3f3' 
  AND token = 'nl0G760ImD32wk0m6hx4ISCXyG6bKoPFGBg5Hrn75FU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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