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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '271a519ace9e411ab543271447fe649a350a365f8280776528eecf86590cd6f3' 
  AND token = 'k1bC7Nc4C7lu0wxgAM8JGFsQ8s6az6VNgNv1YR8QshA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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