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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebf148d09345707fea8edb70caecf532e86086003f26a50b676630d4d170472e' 
  AND token = 'fINkEdNPJZc37bNRf1Fwx9OCUiWN3pKySKM0DidmOwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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