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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '72f7cf3a2f7cbf124cfeb6403da92cd4dc1d086e0004a1daa5505b62ebf533c4' 
  AND token = '35t2yN/Zp7Usp7D6Ek2Xhe5dccmJK1F3FPr1sue9ACw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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