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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2b4964f913c2529d0c6aeb24126ae981cf74097dbd87b0e936f3a90ed37cc30' 
  AND token = 'whkolmCYX2ABeiPbj5brEam2pYaNBJE7zAPOuMI1ERw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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