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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '92420285395bf051ccec7c77c1c19327b50865a4ea134d069a41b3c276ea4af3' 
  AND token = 'Dqzio0NRTCR5UIYCaLtEXl9jN3H3z8e9LmhYLn9ocbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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