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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'afe28ceec446d47f0bc7f2bb577d15f46ceea2277ade3652b0106456d55ae29f' 
  AND token = 'kFNw2Le+Do7WYFYuNq0qxtKN2siplGauah/B96RIRZk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00089

JSON explain

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