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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '89236a04f2931513f7bdb990a54cbabd7e7aaa908878d3e535e4bc8ca84bad80' 
  AND token = 'pKk1Ks5bbO447zmsdh6O2ObHGOnA2r/0MyYyg0ZexsA=' 
  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"
    }
  }
}