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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ecc6799aff0ce6a7f5a65180af39f565fb4656ccfa2eb68ebcd9ff1a1316eed2' 
  AND token = 'jGX/e1pxffiCD5Wh3hwlhQkhO0u4d6mmaAcSLlZgYqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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