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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '95ea94d5f6952e78e4ff8ce633b495920ddb4bcb3ed30ea8d640ea33690de3d5' 
  AND token = '5AOCctE9usS2yE73/Etw71gh4j/HO7pbOSERphknNv0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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