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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'faba8ce49db3e440436f43fd9f4f2f3fa4d0a7ad7dbd5aa2434faa1ea7b9549e' 
  AND token = 'I6xXduQRAUpJeBpvs2HkG/jc2r4DGCHvm71R5BoZkbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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