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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '08d4332eeeaa044cd83c883d4366aa3c441110c04708c88ff2eae3b0ee4ab91c' 
  AND token = 'bdFhFF7eUqLLoJqT3ARuFkRZv00AfPr2dZN4lXMVUZY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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