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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2205ec5513b0f45bb24af23c44b8eda95f2481ab4caba1703186e9b47f3d1cc2' 
  AND token = '32HukJT2wpBNXWKl/c/MEGMbQmHffS4MhjdNox8XzbA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}