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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4bc3a0e80b95f48e1a26508ae6764a275c79eb5cbd508a6e29d8a9c2157c571' 
  AND token = 'RwubRfM7hE8LDiwT656tAJbLpVUN7gDMvjSA2gFcDZc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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