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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '19ac1c09418e778a2ca256b81ad02ad863153455f0cd3ec4881b22d14fede367' 
  AND token = 'mnjLqnfJ8sMOSDcX7n3EbhXGZ3s8mUo5gWdB1hRAGAA=' 
  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"
    }
  }
}