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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0b061a28543910f34872cdde66628e70c9ec08eb31322873005dda949ab89675' 
  AND token = 'jf0XU1oD2ef43Fc7My0ldqfNl9kmS3Lccs7MUZSxYfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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