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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7bb2aa583a05cf2f1ff5b2bd943a1b6dcff740071b6c03e1f4bb79efee023f30' 
  AND token = '0vMShayEHf7onKYSnNYYd/ee5Wj/CYcpzT3zZUMzsuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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