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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '354bee13048a7aef03e1a821c340c3ee6a9886b0f3553aa31afa12578a404a04' 
  AND token = 'geGmsU5OGzUl5vFpo/1lSEcW6ly6l8g++GgeOmCm1WA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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