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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1ac7e93f953e29054a6c878b6dbf7c8da04c8f08575270608cc378560aa98fb' 
  AND token = 'Jc8EJLVtlzR2vbeSU4+18+cu0jDKi4nGCEzEabgrQc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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