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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce875ba40c065662d891e298bc1fa4bf3b1056ead53030414d339514edad6d43' 
  AND token = 'gzPyjNuiO+yVkOY3E3r6LVSuR79Y9/dVU/7kbyfU6y8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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