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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67e0dcfd0869b0661b2cda13b22873ced0a2a318e052a3fed03e79a516b7c031' 
  AND token = '+zRrotjypWBJfqHY07o8QDFQWodT0tNTF8YBn43ENGg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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