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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3064b2ca9fc3f21713cad82b4c95e61de2cc5a2f1e30f586d6ce5f065e3f6067' 
  AND token = 'qHo27wjlHSos+fMktrsECdfC3mCsbnIVb9g9VFWqUUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}