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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa2a048c01307c2bbfe10080893e09aa745c26f769a6dc844e56042cf2923f6f' 
  AND token = 'cpTENCfeg9IO7iMJHTqVrCBYmfkAmoEMVtoAkglNzsw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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