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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7e18027882fd83545b19b2019965ec2a02174a5b095718ed7b37ae05e92b80f9' 
  AND token = 'vTHeP6mgDtE/YsxRmokWpxL9YPI6Xfb4JG3zawmRd9s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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