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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2210df025f83ae7ca544f0483fce711725a29f280b4766edaf83eec30458767e' 
  AND token = 'u2+ruN6OncuiH7XCz5O7JKmKw9irIac8HIwcD1fluF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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