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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f29e346b26a11eb47af2803dd17f3ea649abea83a71c5fec20111af323449a1' 
  AND token = 'iAzeTV+RX/7as0CPfjg11ENjYgLuIRZdgPuz3OGFWSI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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