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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e60ea73a06c5fb05d58ffa54d63a7c4abf85ded38c98e4138c0a4af6b9b827b2' 
  AND token = 'bz11Ua9d6uG43FU6DG2Dxa1JGwGxh0K7iE2aD+odSXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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