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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11167c75a8fda745f8f7f4bea9c5c3942af9d01830382d031b1ed37ad7943cbe' 
  AND token = 'wJ0c1ZMtpK8coSVVir/cMosgWsix99uz+KE3bqM01eM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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