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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60d38c103c3f83c685b27c2807796fd6d5371577784f9abf93b57fa6bedfd537' 
  AND token = 'TlMrSFAiG5zzFic6uEXgcqvZCqBEuHcjeeXl/bLaiZQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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