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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f92cb92ad08b1c4c8c425c1572cacb784ac081918c96cbccf7b742b12850c01' 
  AND token = 'PrfdVcbDSn9dtDISgH/B+6GfFNBBQTY60TpgZORdoIg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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