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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b5d244379f2ed9e23eb16e1702b0437115bb4821cb9c90879b4482190b02684e' 
  AND token = '9V/Keoz7Q4GDaocx0b9uJ07bDxfgJAk5gTnzsHevjos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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