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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b10164284c2cfedacbf5bb23ef43b887246f60183214ffe46e506fd7ee7df18e' 
  AND token = 'w1Zqa62OxkWpZX3a7xPkM6EqxlVOwK3R+k5NypVdmiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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