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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd4ad6196b4abd74cb2c8c8ad18984a2f09c8940de04943ae88109e9aaa98d6c0' 
  AND token = '86l5PZWreT1Ubht2gx2BhSJ7NLqm09eGGP75mGH5Edw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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