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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6c1081e38776ea517c4e10db3b0f95fc58b4c2bcec34a325628d7e80359e08fc' 
  AND token = 'Vx3y7e1axsnZ+Fw+a+u2kYKJSuTkzwabGeTKoMUDNo8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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