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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '41c022e2143ea8a0bf7d4a420c058fbd67b0dec23edf4b703ed2a8932709d440' 
  AND token = 'LI5C9Mj6BNfd3nCYit9V8VdR2ewvUsJcKy0NvXgzoEE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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