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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '836f2f9daf6510d862a66b9864352235ac9dc9dfb8aeb7aa64df9c86760ff375' 
  AND token = 'nMHqN1xH9WkwD8OvT4lBsulM/3o2cBl5Gva5WVdbt8o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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