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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9f95cb62a410156d64800ea065c55df2cbcf928d779e3a23521401090904970b' 
  AND token = '+9bUGcyczzK91f0B4aHh1EMTAxVFwS7uvIuJ7TgNm5U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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